<template>
  <view>
    <!-- 使用自定义的搜索组件 -->
    <my-search @myClick="gotoSearch"></my-search>
    
    <view class="scroll-view-container" > 
      <!-- 左侧的滑动区 -->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px'}">
        <block v-for="(cate,c1) in cateList" :key="c1">
          <view :class="['left-scroll-view-item', c1 === active? 'active':'']"  @click="activeChangeed(c1)">
          {{cate.cat_name}} 
          </view>
        </block>
        </scroll-view> 
     <!-- 右侧的滑动区 -->
     <scroll-view class="right-scroll-view" scroll-y="true" :style="{height:wh + 'px'}"  :scroll-top="scrollTop" >
       <view class="cate-cv2" v-for="(child,c2) in cateLevel2" :key="c2">
         <!-- 二级分类的标题 -->
          <view class="cate-cv2-title">/{{child.cat_name}}/</view>
          <view class="cate-cv3-list">
            <view class="cate-cv3-item" v-for="(child3,c3) in child.children" :key="c3" @click="gotoGoodsList(child3)">
              <!-- 三级图片 -->
                  <image :src="child3.cat_icon.replace('dev','web')" mode=""></image>
                  <!-- 三级文本 -->
                   <text>{{child3.cat_name}}</text>
            </view>
          </view>
       </view>   
     </scroll-view>
    </view>
  </view>
</template>
<script>
  import badgeMix from '@/mixins/tabBar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        //当前设备可用高度
        wh:0,
         // 分类数据列表
            cateList: [],
            active:0,
             // 二级分类列表
                cateLevel2: [],
                // 滚动条距离顶部的距离
                    scrollTop: 0
      };
    },
    onLoad(){
      const sysInfo = uni.getSystemInfoSync()
      this.wh = sysInfo.windowHeight - 50
      this.getCateList()
    },
    methods:{
     async getCateList(){
        const  {data: res} = await uni.$http.get('/api/public/v1/categories')
             if(res.meta.status !== 200) return uni.$showMsg()
               this.cateList = res.message  
                 // 为二级分类赋值
                 this.cateLevel2 = res.message[0].children
      },
      activeChangeed(c1){
        this.active = c1
        this.cateLevel2 = this.cateList[c1].children
         this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },
      gotoGoodsList(child3){
        uni.navigateTo({
          url:'/subpkg/good_list/good_list?cid=' + child3.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
        background-color: #f7f7f7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;
        
        &.active{
          position: relative;
          background-color: #fff;
          &::before{
            content: '';
            display: block;
            width: 3px;
            height:30px;
            background-color: #c00000;
            position: absolute;
            top:50%;
            left: 0;
            transform:translateY(-50%) ;
          }
        }
    }
  }
}
.right-scroll-view{
  background-color: #fff;
  .cate-cv2-title{
    font-size: 12px;
    text-align: center;
    font-weight: bold;
    padding: 15px 0;
  }
  .cate-cv3-list{
    display: flex;
    flex-wrap: wrap;
    .cate-cv3-item{
      display: flex;
      flex-direction: column;
      justify-content:space-between;
      align-items: center;
      width: 33.33%;
      margin-bottom: 10px;
      image{
         width: 60px;
         height: 60px;
      }
      text{
         font-size: 12px;
      }
    }
  }
  
}

</style>
